Chess Stalker — third-party licenses
=====================================
Last updated: 2026-10-07. Chess Stalker uses the following third-party
software, fonts and artwork. Each one is used under the licence listed here.

CHESS ENGINE
------------
Stockfish 19 (WebAssembly build), runs in your browser
  Copyright (C) The Stockfish developers. GNU General Public License v3.
  Licence text: https://chessstalker.com/stockfish/sf19-LICENSE.txt
  Source code: https://github.com/official-stockfish/Stockfish (tag sf_19)
  WebAssembly port: https://github.com/nmrugg/stockfish.js (GPL-3.0)

CHESS PIECES
------------
Kosal (Modern pieces): Kosal Sen, https://github.com/philatype/kosal
  CC BY 4.0, https://creativecommons.org/licenses/by/4.0/ (SVG re-exported and minified; design unchanged)
Cburnett (Classic pieces): Colin M.L. Burnett, Wikimedia Commons
  BSD licence (resized to scale; design unchanged)

GAME DATA
---------
Lichess broadcast games: (c) Lichess contributors, CC BY-SA 4.0
The Week in Chess (TWIC): Mark Crowther, used under a commercial licence agreement
Other games: public tournament records, including the ICCF correspondence archive (iccf.com)

FONTS (SIL Open Font License 1.1, https://openfontlicense.org)
-----
Bricolage Grotesque, DM Sans, JetBrains Mono, Noto Sans Symbols 2,
Space Grotesk, Spline Sans Mono

ICONS AND FLAGS
---------------
Phosphor Icons: MIT, https://phosphoricons.com
Stat icons: Phosphor (MIT), Tabler Icons (MIT), Hugeicons free set (MIT); paths only
Federation flags: Flagpedia / flagcdn.com, public domain

JAVASCRIPT LIBRARIES (bundled)
------------------------------
@phosphor-icons/react 2.1.10: MIT
@radix-ui/react-dialog 1.1.15: MIT
@radix-ui/react-dropdown-menu 2.1.16: MIT
@radix-ui/react-label 2.1.8: MIT
@radix-ui/react-slot 1.2.4: MIT
@radix-ui/react-tabs 1.1.13: MIT
@radix-ui/react-tooltip 1.2.8: MIT
@sentry/browser 10.47.0: MIT
@sentry/react 10.47.0: MIT
chess.js 1.4.0: BSD-2-Clause
class-variance-authority 0.7.1: Apache-2.0
clsx 2.1.1: MIT
firebase 12.8.0: Apache-2.0
html2canvas 1.4.1: MIT
i18next 25.7.4: MIT
react 18.3.1: MIT
react-dom 18.3.1: MIT
react-helmet-async 2.0.5: Apache-2.0
react-i18next 16.5.3: MIT
sonner 2.0.7: MIT
stockfish.js 10.0.2: GPL-3.0
tailwind-merge 3.6.0: MIT
tailwindcss-animate 1.0.7: MIT

The full licence texts of the libraries above are in their own packages
(npm). For questions: see https://chessstalker.com/about#credits